CN102922354A - Friction wheel traction transmission cycloidal processing device - Google Patents

Friction wheel traction transmission cycloidal processing device Download PDF

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Publication number
CN102922354A
CN102922354A CN2012104189668A CN201210418966A CN102922354A CN 102922354 A CN102922354 A CN 102922354A CN 2012104189668 A CN2012104189668 A CN 2012104189668A CN 201210418966 A CN201210418966 A CN 201210418966A CN 102922354 A CN102922354 A CN 102922354A
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China
Prior art keywords
level
planetary gear
grade
planet wheel
output shaft
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CN2012104189668A
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Chinese (zh)
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CN102922354B (en
Inventor
王春
谢志伟
葛研军
周智鹏
林盛
单丽君
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Dalian Jiaotong University
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Dalian Jiaotong University
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Priority to CN201210418966.8A priority Critical patent/CN102922354B/en
Publication of CN102922354A publication Critical patent/CN102922354A/en
Application granted granted Critical
Publication of CN102922354B publication Critical patent/CN102922354B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention discloses a friction wheel traction transmission cycloidal processing device. The friction wheel traction transmission cycloidal processing device is that a first-stage sun wheel, an input shaft, a first-stage planet wheel, a first-grade planet wheel support, a first-grade friction ring and a housing form a first-grade planetary reduction gear; a second-grade sun wheel, a second-grade planet wheel, a second-grade planet wheel support, a second-grade friction ring and the housing form a second-grade planetary reduction gear; a driving wheel, a driven wheel A, a transmission wheel B, a driven wheel and an intermediate shaft form a second-grade friction wheel traction transmission mechanism; an output shaft is arranged on the second-grade planet wheel support; and an eccentric distance is generated between the output shaft and the input shaft. When in use, the rotary motion of the input shaft is converted into a turning motion in which the output shaft is rotated around the input shaft by a second-grade friction wheel traction transmission planetary reduction gear; the rotary motion of the input shaft is transmitted to the output shaft based on the transmission ratio approximate to 1: 1 by the second-grade friction wheel traction transmission mechanisms; and a cutter is arranged on the output shaft by a cutter fixing device, so that the cycloidal processing motion of the cutter can be achieved.

Description

A kind of friction pulley Traction Drive machining of cycloid device
Technical field
The present invention relates to a kind of friction Traction Drive technology, particularly a kind of friction pulley Traction Drive machining of cycloid device.
Background technology
Fluting processing in the tradition Milling Process generally adopts milling cutter to carry out the wide processing of full cutter at milling machine.In working angles, there are many unfavorable factors in the complete wide processing of cutter to cutter, and such as the discharging difficulty of heat in metal cutting and smear metal, it is large etc. that cutter is subject to cutting load.Along with the fast development of High-speed Machining Technology, for fear of the wide processing of full cutter of cutter, advanced digital control system adopts the machining of cycloid technology.Machining of cycloid moves along specified path with circular move mode, excises gradually the material in the blank, thereby can avoid the wide cutting of full cutter of cutter.The machining of cycloid cutter path is a smooth continuous curve of first derivative.In the cycloidal type High-speed machining process, cutter is in dynamic comprehensive cutting, and cutter hub has evenly reduced the Tool in Cutting load along periphery is stressed, has improved the stability of load.Cutter forward cutting material also is accompanied by backward empty feed, and cutter has sufficient time cooling like this, simultaneously, can also automatically take away smear metal, thereby greatly improve machining condition, improves cutter life.Machining of cycloid has great advantage for the processing tool of the narrow groove of high hardness material and die cavity.But adopt the machining of cycloid technology, require the NC Machine Tools Coordinate axle constantly to move back and forth, namely lathe is among the concussion, is unfavorable for the maintenance in machine tool accuracy and life-span, particularly for large-sized gantry formula CNC milling machine, reference axis moves back and forth at a high speed and also is difficult to realize.The high-precision grinding that carries out endoporus on the jig grinder adds man-hour, normal operation planet electric grinder.Workpiece is fixed on the workbench, and emery wheel is also done planetary motion around the electric grinder axis except making High Rotation Speed.But the planet electric grinder is driven respectively the planetary motion of emery wheel high speed rotary motion and emery wheel by two cover power set.
Summary of the invention
Be to solve the problems referred to above that prior art exists, the present invention will design a kind of precision that not only can keep lathe and life-span, but also can two overlap the friction pulley Traction Drive machining of cycloid device of power set.
To achieve these goals, technical scheme of the present invention is as follows: a kind of friction pulley Traction Drive machining of cycloid device, comprise power shaft, the one-level sun gear, the one-level planetary gear, shell, the one-level planetary carrier, the secondary planet wheel, secondary solar gear, the secondary planet wheel support, driving wheel, driven pulley, the one-level dead turn, the secondary dead turn, drive A, jackshaft, drive B and output shaft, described one-level sun gear is installed on the power shaft, described one-level planetary gear contacts and is installed on the one-level planetary carrier with the one-level sun gear, described one-level dead turn contacts and is installed on the shell with the one-level planetary gear, described one-level sun gear, power shaft, the one-level planetary gear, the one-level planetary carrier, one-level dead turn and shell form first order planetary gear speed reducing mechanism; Described secondary solar gear is installed on the one-level planetary carrier of first order planetary gear speed reducing mechanism, described secondary planet wheel contacts and is installed on the secondary planet wheel support with secondary solar gear, described secondary dead turn contacts and is installed on the shell with the secondary planet wheel, and described secondary solar gear, secondary planet wheel, secondary planet wheel support, secondary dead turn and shell form second level planetary gear speed reducing mechanism; Described driving wheel is installed on the other end on the power shaft, described drive A, drive B are installed on the jackshaft on the secondary planet wheel support that is fixed on second level planetary gear speed reducing mechanism, described driven pulley is installed on the output shaft, and described driving wheel, drive A, drive B, driven pulley and jackshaft form secondary friction pulley traction drive mechanism; Described output shaft is installed on the secondary planet wheel support of second level planetary gear speed reducing mechanism; There is eccentric throw between described output shaft and the power shaft.
Between first order planetary gear speed reducing mechanism of the present invention and the second level planetary gear speed reducing mechanism one or more levels planetary gear speed reducing mechanism is arranged, to change output shaft around the speed of gyration of power shaft.
When the present invention works, secondary friction pulley Traction Drive planetary gear speed reducing mechanism, power shaft rotatablely moved is converted to output shaft around the gyration of power shaft; Simultaneously, secondary friction pulley traction drive mechanism, by the gearratio of approximate 1:1 power shaft being rotatablely moved passes to output shaft; Cutter is installed on the output shaft by cutter holding device, thereby realizes the machining of cycloid motion of cutter.
Compared with prior art, the present invention has following beneficial effect:
1, because the present invention adopts multi-stage friction wheel Traction Drive planetary gear speed reducing mechanism, power shaft rotatablely moved be converted to output shaft around the gyration of power shaft, avoided existing digital control system machining of cycloid technology to the constantly reciprocating requirement of Digit Control Machine Tool reference axis, be conducive to the maintenance in machine tool accuracy and life-span, solved simultaneously the problem that large-sized gantry formula CNC milling machine can't carry out machining of cycloid.
2, the present invention only requires a power input source, has avoided existing planet electric grinder to the requirement of two cover power set.
3, because the used friction pulley Traction Drive of the present invention is to come transmitting torque and power by the shearing force of the elastic fluid lubricating oil film (EHL) between two smooth metal rollers.Compare other transmission, such as gear drive etc., the advantages such as Traction Drive has mechanical efficiency height, stable drive, noise is low, processing is simple, low cost of manufacture.
4, the present invention is except possessing above-mentioned advantage, also has compact conformation, volume is little, lightweight, the life-span is long advantage, can be applicable on milling machine or the machining center milling or grinding groove, endoporus, the particularly fluting of large-sized gantry milling machine processing.
Description of drawings
The present invention is 1 of drawings attached only, wherein:
Fig. 1 is the friction pulley Traction Drive machining of cycloid device schematic diagram with two-stage planetary gear speed reducing mechanism.
Among the figure: 1, power shaft, 2, the one-level sun gear, 3, the one-level planetary gear, 4, shell, 5, the one-level planetary carrier, 6, the secondary planet wheel, 7, secondary solar gear, 8, the secondary planet wheel support, 9, driving wheel, 10, driven pulley, 11, the one-level dead turn, 12, the secondary dead turn, 13, drive A, 14, jackshaft, 15, drive B, 16, output shaft.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described further.Have the friction pulley Traction Drive machining of cycloid device of two-stage planetary gear speed reducing mechanism as shown in Figure 1, formed by power shaft 1, output shaft 16, one-level sun gear 2, one-level planetary gear 3, one-level planetary carrier 5, one-level dead turn 11, secondary solar gear 7, secondary planet wheel 6, secondary planet wheel support 8, secondary dead turn 12, driving wheel 9, drive A13, drive B15, driven pulley 10, jackshaft 14, shell 4 etc.Form first order friction pulley Traction Drive planetary gear speed reducing mechanism by one-level sun gear 2, one-level planetary gear 3, one-level planetary carrier 5, one-level dead turn 11, the secondary friction pulley Traction Drive planetary gear speed reducing mechanism that is formed by secondary solar gear 7, secondary planet wheel 6, secondary planet wheel support 8, secondary dead turn 12.Power shaft 1 is connected with machine tool chief axis by taper shank.Torque by first and second grade friction pulley Traction Drive planetary gear speed reducing mechanism, is converted to output shaft 16 around the gyration of power shaft 1 from power shaft 1 input.For making overall dimensions of the present invention unlikely excessive, one-level planetary gear 3 and secondary planet wheel 6, one-level sun gear 2 are more or less the same with the diameter of the interior dead turn 12 of secondary with secondary solar gear 7, the interior dead turn 11 of one-level, and the gearratio of first order planetary gear speed reducing mechanism and second level planetary gear speed reducing mechanism is close.For realizing the cycloid motion track of cutter, output shaft 16 and power shaft 1 have the off-centre of certain distance.Machine tool chief axis connects the torque that passes to power shaft 1 by taper shank, passes to output shaft 16 by the transmission of secondary friction pulley.Driving wheel 9 is installed on the power shaft 1, drive jackshaft 14 by the drive A13 that is installed on the jackshaft 14, by the drive B15 that is installed on the jackshaft 14, the driven pulley 10 of drive installation on device output shaft 16 passes to input torque output shaft 16 at last again.The gearratio of secondary slip gear is approximately 1:1.Between described first order planetary gear speed reducing mechanism and the second level planetary gear speed reducing mechanism one or more levels planetary gear speed reducing mechanism is arranged, to change output shaft 16 around the speed of gyration of power shaft 1.
Between the friction pulley that the friction traction drive mechanism requires to be in contact with one another enough normal pressures are arranged, to form the high pressure traction oil film, reach enough Traction Drive efficient.Below two kinds of methods enough normal pressures can be provided between friction pulley: (1) symmetrical planetary roller friction towing gear generally adopts tapered raceway, by adjusting range opposite or the moving axially of tapered raceway of configuration back-to-back, produce radial displacement, thereby traction or the needed normal pressure of frictional drive are provided.The pressure autoloading structure of planetary roller Traction Drive adopts ball V-type groove or edge cam mechanism, and their operation principle is basic identical.Among the present invention, one-level sun gear 2, secondary solar gear 7, driving wheel 9, driven pulley 10 are respectively by two parts and intermediate gasket form up and down.Two parts are all with certain gradient up and down, axial displacement between adjusting two parts can be controlled the radial displacement between one-level sun gear 2 and one-level planetary gear 3, secondary solar gear 7 and the secondary planet wheel 6, then regulate the magnitude of interference, thereby provide normal pressure for frictional drive.(2) friction pulleys at different levels adopt expansion sleeves, and the radial displacement of the swelling screw control friction pulley profile by regulating expansion sleeve reaches the effect that normal pressure is provided.In apparatus of the present invention, one-level sun gear 2, secondary solar gear 7, driving wheel 9, driven pulley 10, drive A13, drive B15, one-level planetary gear 3 and secondary planet wheel 6 can be at its outside expansion sleeves of installing.

Claims (2)

1. friction pulley Traction Drive machining of cycloid device, it is characterized in that: comprise power shaft (1), one-level sun gear (2), one-level planetary gear (3), shell (4), one-level planetary carrier (5), secondary planet wheel (6), secondary solar gear (7), secondary planet wheel support (8), driving wheel (9), driven pulley (10), one-level dead turn (11), secondary dead turn (12), drive A(13), jackshaft (14), drive B(15) and output shaft (16), described one-level sun gear (2) is installed on the power shaft (1), described one-level planetary gear (3) contacts and is installed on the one-level planetary carrier (5) with one-level sun gear (2), described one-level dead turn (11) contacts and is installed on the shell (4), described one-level sun gear (2) with one-level planetary gear (3), power shaft (1), one-level planetary gear (3), one-level planetary carrier (5), one-level dead turn (11) and shell (4) form first order planetary gear speed reducing mechanism; Described secondary solar gear (7) is installed on the one-level planetary carrier (5) of first order planetary gear speed reducing mechanism, described secondary planet wheel (6) contacts and is installed on the secondary planet wheel support (8) with secondary solar gear (7), described secondary dead turn (12) contacts and is installed on the shell (4) with secondary planet wheel (6), and described secondary solar gear (7), secondary planet wheel (6), secondary planet wheel support (8), secondary dead turn (12) and shell (4) form second level planetary gear speed reducing mechanism; Described driving wheel (9) is installed on the other end on the power shaft (1), described drive A(13), drive B(15) be installed on the jackshaft (14) that is fixed on the second level planetary gear speed reducing mechanism secondary planet wheel support (8), described driven pulley (10) is installed on the output shaft (16), described driving wheel (9), drive A(13), drive B(15), driven pulley (10) and jackshaft (14) form secondary friction pulley traction drive mechanism; Described output shaft (16) is installed on the secondary planet wheel support (8) of second level planetary gear speed reducing mechanism; There is eccentric throw between described output shaft (16) and the power shaft (1).
2. a kind of friction pulley Traction Drive machining of cycloid device according to claim 1, it is characterized in that: between described first order planetary gear speed reducing mechanism and the second level planetary gear speed reducing mechanism one or more levels planetary gear speed reducing mechanism is arranged, to change output shaft (16) around the speed of gyration of power shaft (1).
CN201210418966.8A 2012-10-26 2012-10-26 Friction wheel traction transmission cycloidal processing device Expired - Fee Related CN102922354B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104759924A (en) * 2015-04-13 2015-07-08 大连交通大学 Friction wheel traction transmission planetary machining knife handle
CN110315113B (en) * 2019-06-19 2020-06-05 北京理工大学 Design and assembly method of single-shaft input planetary composite milling tool
CN114012154A (en) * 2021-11-18 2022-02-08 大连交通大学 Milling torque measuring sensor

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GB2218181A (en) * 1988-05-04 1989-11-08 Reliance Gear Co Gearing device
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CN202861869U (en) * 2012-10-26 2013-04-10 大连交通大学 Friction wheel traction transmission cycloid machining device

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GB2218181A (en) * 1988-05-04 1989-11-08 Reliance Gear Co Gearing device
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CN202158144U (en) * 2011-07-20 2012-03-07 大连交通大学 Multistage pinwheel output pin swing planetary transmission speed reducer
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104759924A (en) * 2015-04-13 2015-07-08 大连交通大学 Friction wheel traction transmission planetary machining knife handle
CN110315113B (en) * 2019-06-19 2020-06-05 北京理工大学 Design and assembly method of single-shaft input planetary composite milling tool
CN114012154A (en) * 2021-11-18 2022-02-08 大连交通大学 Milling torque measuring sensor

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